Fence



FIG. 1 is a perspective view of a fence; the broken lines are for illustrative purposes only and form no part of the claimed design;

FIG. 2 is a left side view; the right side view is a mirror image thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a front view thereof; and,

FIG. 5 is a bottom view thereof. 

I claim the ornamental design for a fence, as shown and described. 